Permanent magnet synchronous servo motors are widely used in the field of small-to-medium capacity, high-precision transmission. They generate a magnetic field by adding permanent magnets to the rotor. Due to the inherent properties of permanent magnet materials, they can establish a strong permanent magnetic field in their surrounding space without external energy input. This simplifies the motor structure and saves energy.
Features of Energy-Saving Permanent Magnet Servo Motors
(1) High power factor and high efficiency;
(2) Simple structure and reliable operation;
(3) Small size, light weight, and low loss.
Compared to other types of motors:
(1) Compared to DC motors, it does not have the disadvantages of DC motors such as commutators and brushes;
(2) Compared to asynchronous motors, it has higher efficiency, higher power factor, larger torque-to-inertia ratio, reduced stator current and stator resistance losses, and measurable rotor parameters and good control performance because it does not require reactive excitation current;
(3) Compared to ordinary synchronous motors, it eliminates the excitation device, simplifies the structure, and improves efficiency to achieve high performance (such as ultra-high efficiency, ultra-high speed, and ultra-high response speed) that traditional electrically excited motors cannot match;
(4) Compared to switched reluctance motors (SR), it does not have the problem of large torque ripple at low speeds and has long achieved stable low-speed operation, thus making it suitable for fast and high-precision control applications;
(5) Compared to brushless DC permanent magnet synchronous motors (BLDCM), it is more competitive in high-precision servo drives.